The observed effect of flotation operating conditions and particle properties on water recovery at laboratory scale

Wang, L., Runge, K. and Peng, Y. (2016) The observed effect of flotation operating conditions and particle properties on water recovery at laboratory scale. Minerals Engineering, 94 83-93. doi:10.1016/j.mineng.2016.05.003


Author Wang, L.
Runge, K.
Peng, Y.
Title The observed effect of flotation operating conditions and particle properties on water recovery at laboratory scale
Journal name Minerals Engineering   Check publisher's open access policy
ISSN 0892-6875
1872-9444
Publication date 2016-08
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.mineng.2016.05.003
Open Access Status Not Open Access
Volume 94
Start page 83
End page 93
Total pages 11
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon Press
Collection year 2017
Language eng
Formatted abstract
The entrainment of fine gangue particles has become a critical issue in flotation nowadays when low quality and complex ores are processed. Water recovery contributes significantly to gangue entrainment and greatly affects concentrate grade. In this study, a factorial batch flotation experiment was performed to investigate the main and combined effects of gas flowrate, froth height, impeller speed and gangue particle density on water recovery using a mixture of liberated chalcopyrite and gangue minerals in a 3.5 L batch flotation cell.

Results show that water recovery was significantly affected by (1) froth height, (2) gas flowrate, (3) impeller speed, (4) the interaction between impeller speed and particle density, and (5) the interaction between gas flowrate and froth height (in the order of reducing effects). Interestingly, water recovery was less sensitive to gas flowrate as froth height was increased, and more sensitive to froth height as gas flowrate was increased. There was an increase in the amount of water entering the froth phase from the pulp when increasing impeller speed, especially in the context of high-density gangue mineral systems.

The identified effects and interactions and the effect of froth residence time on water recovery suggest that water recovery could be predicted effectively if both water drainage and water entering the froth from the pulp are considered. A model based on these two parameters was proposed in this paper.
Keyword Water recovery
Flotation froth
Entrainment
Degree of entrainment
Operational conditions
Particle properties
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Julius Kruttschnitt Mineral Research Centre Publications
School of Chemical Engineering Publications
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Created: Wed, 29 Jun 2016, 21:30:49 EST by Dr Yongjun Peng on behalf of School of Chemical Engineering